Conduit Entrance: Two conduit entrances provided for ½" conduit with ½" NPT threaded connections. Use an ATEX certified plug of protection "d", "tb", and IP66 for all unused conduit openings.

For use in hazardous locations, Classified as:

Class I: Div. 1 & Div. 2, Groups C, D

Class II: Div. 1 & Div. 2, Groups E, F, G

Class III: Div. 1 & Div. 2

Suitable for indoor or outdoor use with factory installed gasket andcast aluminum housing

NEMA 4 Rated Enclosure - use with appropriate conduit fitting

Temperature range: 40°F / 120°F, 4,5°C/49°C

Non-corrosive sleeve factory installed in saddle

Description

The Model VSR-FEX is a vane type waterflow switch for use on wet sprinkler systems located in hazardous locations as shown above. The unit may also be used as a sectional waterflow detector on large systems.

The unit contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a flow of 10 gallons per minute (38 Lpm) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard period.

The unit is enclosed in a cast aluminum housing. The cover is held in place with six M6 x 1mm-6g; 30mm long socket head cap screws with a 5mm hexagonal drive head and a property class of 8.8. These screws can only be replaced with identical ones.

Compatible Pipe/Installation Requirements

Model

Pipe Size

Hole Size

inch

mm

inch

mm

VSR-F-EX-2

2

50

1¼ + 1⁄8 - 1⁄16

33 ± 2

VSR-F-EX-2.5

2.5

-

VSR-F-EX-3

3

80

2 ± 1⁄8

50 ± 2

VSR-F-EX-3.5

3.5

-

VSR-F-EX-4

4

-

VSR-F-EX-5

5

-

VSR-F-EX-6

6

-

VSR-F-EX-8

8

200

The Potter model VSR-F-EX-5 is a vane-type explosion proof flow switch with retard and SPDT contact(s), designed for use with 5-inch steel pipe.